Experiment is carried out to try and create rain by dropping dry ice onto clouds.
Croydon to Manchester.
Various shots of packets of dry ice being loaded into aeroplane, they are to be dropped onto a certain type of cloud to make it rain. Various shots of clouds taken from aeroplane. Various shots of light 'plane, probably Consul. Various shots in 'plane of two men unwrapping blocks of dry ice. M/S clouds.